Guide-bar for stocks and dies



(Nd Model.)

J. A. BURNS & J. T. FAGAN. v GUIDE BAR FOR STOCKS AND DIES.

- No. 584,919. Patented June 22,1897.

. W/J/VESSES: j

% a/Nl/i/VTORS. %m% I I hi Arm/3% NlTE STATES ATENT JOHN A. BURNS, on ALLEGHENY, AND JOHN T. FAGAN, or PITTSBURG, PENNSYLVANIA.

GUIDE-BAR Foe STOCKS AND mas.

SPECIFICATION forming part of Letters Patent No. 584:,919, dated June 22, 1897.

Application filed December 8, 1896. fierial No. 614,905. (No model.)

To all whom it may concern.-

Be it known that we, JOHN A. BURNS, residing at Allegheny, and JOHN T. FAGAN, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, citizens of the United States, have invented certain new and useful Improvements in Guide-Barsfor Stocks and Dies; and we hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference bein g had to the accompanying drawings, which form a part of this specification, in Which Figure 1 is a side elevation, partly in section, of the usual stocks and die, showing application thereto of our improved guide-bar and nipple-holder with socket and nipple in section secured thereon. Fig. 2 is an end view of the same.

Our invention relates to devices to hold nipples during the operation of threading the same.

Heretofore, so far as we are aware,in threading nipples a socket was screwed upon one end of a piece of pipe, the opposite end of the pipe being secured in the jaws of a vise. The nipple was then screwed into the socket, and the guide of the stocks was centered on the nipple and the stocks with dies secured therein turned upon the nipple. Very little movement would take place until the end of the guide of the stocks engaged against the end of the socket in which the nipple being operated on is secured, thus limiting the length of the thread that may be cut thereon with the guide in the same horizontal plane as the nipple. If the movement of the stocks is continued, the guide would of necessity be required to slip over and be centered upon the socket instead of upon the nipple, as in the first part of the operation. From the limited support given the guide by said socket and its position with reference to the nipple extreme difficulty is encountered in producing true threads on said nipple.

Our object is to produce a device adapted to use in any of the usual stocks and dies for cuttingthreads on nipples, by the use of which the nipple being threaded is maintained in the same horizontal plane during the operation as the guide, whereby any length and diameter may be threaded and at the same time threaded perfectly true.

We will now describe our invention, reference being had to the accompanying drawings, forming part hereof, in which A is a stock and die of the usual construction, which instead of being applied as usual is reversed. B is the usual guide thereof.

0 is the extension guide-bar and nippleholder adapted to be passed between the dies in the stocks and to project through said stocks and nipple and preferably of slightly less diameter than the nipple and of substantially the same diameter as the bore of the guide, whereby the guide and nipple are maintained on the same horizontal plane, as shown in the drawings, which insures a perfect support for the guide and enables the production of true threads on the nipple, and is provided with threaded shoulders or abutments c for the reception of the socket b, the diameter of said threaded abutments or shoulders corresponding to the outer diameter of the nipple to be threaded and to the inner diameter of the socket b, secured thereon, and in which the nipple d is screwed for the purpose of enabling the opposite end thereof to be threaded by dies or cutters (not shown) secured in the stocks in the usual manner.

The operation of our device is as follows, viz: The end e of the extension guide-bar and nipple-holder being secured in the jaws of a vise, (not shown,) the nipple to be threaded being screwed into the socket secured thereon, the stocks are then slipped over the opposite end of the extension guide-bar with the dies therein immediately adjacent to the end of I the nipple to be operated on; in other words, reversed to their usual manner of application. The guide of the stock is then centered on the extension-bar and the stocks turned so as to move the same toward the nipple. After the thread has been started the set-screws may be released. .It is apparent from the drawings that any length of nipple may be cut, dependent altogether upon the length of the guide extension-bar used, and that an absolutely true guide is provided that insures perfect threads on the nipple. It is observable that a slight space is permitted between the inner sides of the nipple and the outer periphery of the extension-bar for the purpose of enabling a clean cut to be made through a pipe and to prevent a bur on the inner end of the same.

Having described our invention, What We claim, and desire to secure by Letters Patent, 1s-

1. As a new article of manufacture, a guidebar for stocks, having a threaded shoulder thereon for the reception of a standard socket, the said guide-bar being adapted to project through the nipple and the stocks, substantially as described.

2. As a new article of manufacture, a guidebar for stocks, having a plurality of threaded shoulders adapted to receive correspondinglysized standard sockets, and adapted to project through the nipple thereon and the diestocks, substantially as described.

3. In a nipple-cutting device, the combination of a dic'stock and a guide-bar having a threaded shoulder thereon for the reception of a nipple-holding device; said bar being adapted to project through the nipple and the stock, substantially as described.

4. In a device for cutting nipples, the C0111- bination of a die-stock; a guide-bar adapted to project through said stocks and the nipple to be operated upon; a socket or holder adapted to be secured on the enlarged threaded portion or shoulder on said guide-bar, and a die-stock guide adapted to be centered and supported upon said guide-bar on the side of the stocks opposite to that of the nipple bein g operated upon, substantially as described.

In testimony that We claim the foregoing We hereunto affix our signatures in the presence of two Witnesses.

JOHN A. BURNS. JOHN T. FAGAN. In presence of GEO. I PARKER, C. A. WILLIAMs. 

